Abstract: A self-contained oxygen generator containing a PSA unit and a flowmeter in the outlet line. The flowmeter provides a signal which represents the flow rate of the oxygen in the outlet line. A leakage circuit with a calibrated orifice and a solenoid valve are also located on the outlet line. In response to a signal from the flowmeter, the solenoid can be actuated so as to provide a calibrated leakage at the outlet of the PSA. This calibrated leakage is useful when overall oxygen usage is too low.

Abstract: The self-contained oxygen generator, of the type with a PSA unit (3), includes, in the outlet line (5), a flowmeter (13) providing a signal (14) representative of the flow rate of oxygen circulating in the outlet line, the latter being connected to a leakage circuit (15) comprising a calibrated orifice (17) and a solenoid valve (16) actuated in response to a signal (18) derived from the flow rate signal (14) provided by the flowmeter and organizing a calibrated leakage at the outlet from the PSA unit in the case of too low an oxygen consumption.